Mechanochemistry of an Interlocked Poly[2]catenane:From Single Molecule to Bulk Gel

作     者：Hao Xing Zhandong Li Wenbo Wang Peiren Liu Junkai Liu Yu Song Zi Liang Wu Wenke Zhang Feihe Huang 

作者机构：State Key Laboratory of Chemical EngineeringDepartment of ChemistryCenter for Chemistry of High-Performance&Novel MaterialsZhejiang UniversityHangzhou 310027(China) State Key Laboratory of Supramolecular Structure and MaterialsCollege of ChemistryJilin UniversityChangchun 130012(China) Key Laboratory of Macromolecular Synthesis and Functionalization of Ministry of EducationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027(China) Department of ChemistryThe Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionInstitute for Advanced StudyDepartment of Chemical and Biological Engineering and Division of Life ScienceThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong(China) 

出 版 物：《CCS Chemistry》 (中国化学会会刊（英文）)

年 卷 期：2020年第2卷第1期

页      面：513-523页

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070305[理学-高分子化学与物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：We are grateful to acknowledge the National Basic Research Program(2013CB834502,2013CB834503) the National Natural Science Foundation of China(91527301,21434005,21525418,51773179,11302190,and 11432012) the Open Project of State Key Laboratory of Supramolecular Structure and Materials(sklssm201611)for financial support 

主　　题：polycatenane supramolecular polymer mechanochemistry single-molecule force spectroscopy 

摘      要：Mechanically interlocked molecules(MIMs)are prototypical molecular machines with parts that enable controlled,large-amplitude movement with one component positioned relative to *** MIMs into polymeric matrices is promising for the designing of functional materials with unprecedented ***,the central issue is the challenges involved with establishing the mechanistic linkage between the single-molecule and the bulk ***,we explore the mechanochemical properties and energetic details of a linear poly[2]catenane with strong intercomponent hydrogen bonding(IHB)revealed by single-molecule force *** results showed that the individual linear poly[2]catenane chain exhibited typical sawtooth pattern,corresponding to the reversible unlocking and relocking transitions under external force or upon stimulations to dissociate or re-form the strong ***,when a poly[2]catenane-based polymer gel was prepared using a thiol-ene click reaction between thiol-ended poly[2]catenane and a low-molecule-weight cross-linker,the resultant gel showed excellent mechanical adaptability and dynamic properties,which correlated well with the molecular-level *** unique poly[2]catenane structure also contributed to the gel formation with an extraordinary IHB-mediated swelling behavior and shape memory *** our present results demonstrate the functioning of bulk material in a linear tandem manner from the behavior of a single molecule,a finding which should be applicable to other systems with versatile properties and promising applications.